Hydroponic tower



FIG. 1 shows a perspective view of a hydroponic tower showing my new design;

FIG. 2 shows a front elevation view thereof;

FIG. 3 shows a back elevation view thereof;

FIG. 4 shows a left side elevation view thereof;

FIG. 5 shows a right side elevation view thereof;

FIG. 6 shows a top plan view thereof;

FIG. 7 shows a bottom plan view thereof; and,

FIG. 8 shows a perspective view thereof.

The broken lines in the drawings illustrate environmental structure on the article that forms no part of the claimed design. 

CLAIM The ornamental design for a hydroponic tower, as shown and described. 